Rubber-molding apparatus



Aug. 11, 1925.

J.F.ALLEN RUBBER MOLDING APPARATUS Filed June 18, 1924 2 sheets-shed 1 1mg. M, 19275. 1549 J. F. ALLEN RUBBER MOLDING APPARATUS Filed J1me 1924 2 Sheets-Shea? 2 FIG 3 of which the following rality of these Patented Angeli, i925.

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@I FWQEO JOHN F. ALLEN, 0F ERIE, PENNSYLVANIA, ASSIGNOR 0F ONE-THIRD T0 J. A. HIM- ROD AND OWE-THIRD '10 EDWARD E. ALLEN, BOTH 01? ERIE, PENNSYLVANIA;

RUBBER-MOLDING- APPARATUS.

Application filed June 18, 1924.. Serial No. 720,872.

To all whom it may camera."

Be it known that ll, JOHN- F. ALLEN, a citizen of the United States, residing at Erie, in the county of Erie and State of Pennsylvania, have invented new and useful Improvements in Rubber-Molding Apparatus,

is a specification.

This invention is designed to mold rubber articles and is exemplified for making receptacles for storage batteries. Such an apparatus should be arranged for reloading the, mold and conveniently discharging the same without distorting the article. I

The invdntion is illustrated in the accom- 7 panymg drawings as follows Flg. 1 shows a side elevation, partly in Fig. 2.

the line 22 in Fig. 1.

Fig. 3 a side elevation of the head, the View being at right angles from that shown in Fig.1.. 3

1 marks the base, 2 the ram cylinder, 3 the ram, 1 the ram cap, 5 the press head, and 6 rods connecting the base and head. These are of usual construction.

' A mold case 7 is arranged on the ram cap; This is steam-heated, the steam being admitted to the ram cap through openfings 8 and the mold casing having steam cavities 9 connected with the openings 8. "mold case forms This a box open atthe top and 'on the'ordinary press there would be a pluboxesas shown.

*Amold lining is arranged within the box and comprises thewbottom 10, the sides 11 and ends 12, the sides and ends-being supe'r- 'imp'osed upon the bottom and preferably set d0 them [initially in place. rangement of 'mold lining the mold lining may be'stripped out-fof' 5 exerted on "the bottnf narv -'-;*"FA" knock out pin 14 "extends through the ram cap. "These" have into agroove' 13 in the bottom so as to hold I heads'which are arr-an ed -in socketsbnder pins 14:. As the the bea les of the inod lining. slide-s17 jaremounted inguides'18 in the base, the

st as, to; hem. the pathof the knock-out heed to t pl a mom and held in lifted position so as to ram is conveniently having three compartments.

30 arranged in sockets 31in the "With this 'arthe case by pressure which have the pivots 20 on the base. Links 21 connect these levers with a rock arm 22 so that both slides may be. thrown simultaneously.

In order to force the ram downwardly so as to assure the stripping of the mold lining 1 provide the following mechanism: A hollow rod 23 is secured to the mold casing and connected with the cavity 9. It extends through an opening 23 in the head 5 and is secured to a piston 24. The piston operates in a cylinder 25. Steam is admitted to the cylinder through an opening 26. Steam remains on the piston constantly so that there is a sufiicient pressure to force the ram downwardly to affect the stripping of the mold lining. Further steam is delivered in this Way'to the mold casing and ram cap. p

The mold is made up of sections 27 and 28, the receptacle or batterybox being'formed with the mold exemplifying the invention The end sections 27' are formed rigid with. the head while the central section 28 is preferably mounted 011' pins 29,.th'e pins having heads press head 5; This permits a limited movement of the thus separating thescores from the sections 27 prior to the separation of the section 28;'

This reduces the strain on the formedv article and is less liable to result a distortion of the article as the core'is removed. v J 1 -While IhavefshoWn themold rovided with overhanging; or crosswise jextendingv shoulders engaging the wallsv of the jmoldedf article this holding the-molded article in' the" mold during the retractionfofjthe mold and consequent stripping of the cores from the receptacle I' have not claimed this feature s li-de's'being adapted to be moved inwardly in thefpresent application, this forming the 'WhatfT claim new isz 5 1. In a rubber molding apparatus, the combination of a mold; a ram carrying the mold; a head closing the ram; a steam cylinder on the head; a piston in the cylinder;

'and a hollow piston rod extending from mold; a head opposing the ram; a mold core I mounted on .the head; a fluid cylinder mounted on the head; a piston in the cylinder; and a rod extending against the ram to force a return movement of the ram to force the mold from the core.

3. In a rubber molding apparatus,.the'

- combination of a ram; a mold on the ram;

a. knock-out device operating to discharge the moldon a backward 'movement of the ram; and means forcing a backward movement of-the ram comprising a cylinder on the head, a piston in the cylinder, and means for communicating the movement of the piston the ram.

4. a rubber molding apparatus, the combination of a ram; a mold case on the ram; means fo-rsubjecting the mold case to a vulcanizing heat; a separable mold lining in the case; and a knock-out acting on a backward movement of the ram on the mold lining to discharge it from the case.

5. In a rubber molding apparatus, the combination of a mold case; means for. subjecting the case to vulcanizing heat; a separable mold lining in the case; a mold core completing the interior of the mold within the case; fluid-actuated means forcing the core into the case to fill the mold with material and holding the parts under pressure during the vulcanizing action and for first disengaging the core from the mold and 7 means associated therewith then disengaging the lining from the case.

6. In a rubber molding apparatus, the

combination .of a ram; a mold case on the I a ram; a separable mold lining in the case; a

knock-out actin on the mold lining to discharge it from t e case actuated by a move ment of the ram; and means mounted on the head forcing a backward movement of the ram.

7. In a rubber molding apparatus, the combination of a ram; a mold case mounted on the ram; a separable mold lining 'ar-' ranged in the case comprising a bottom and superimposed separable sides and ends; a

knock-out pin mounted in the rain; and

means movable in the path of the pin for dischar ing the lining.

8. n a rubber molding ap aratus, the combination of a ram; a plura ity of mold casings; on the ram; anold liningsarranged in the casings; knock-out pins arranged under the linings; knock-out means adapted to be moved in the path of the pins; and a common device for actuating said means simultaneously. v

9. In a rubber molding apparatus, the combination of a ram; a head opposed to the ram; a mold mounted on the ram; a mold core carried'by the head; and means mounted on the head for forcing a backward movement of the ram to disengage the mold from the core.

combination of a ram; a head opposed to the ram; a mold mounted on the ram; and a core mounted on the head, said core having a plurality of sections, one of the sections being movably mounted makin the parting of the sections from the mol successive.

11. In a rubber molding apparatus, the combination of a mm; a head opposed to the ram; a mold mounted on the ram; and

a core mounted on the head, said core having a plurality of sections, one of the sec tions being movably mounted makinthe parting of the sections'from the mol successive comprising headed pins extending;

10. In a rubber molding apparatus, the

lining in the mold; a mold core; power actuated mechanism exertingmolding pressure on the mold; power actuated apparatus comprising pressure devices separatin lining and the core and means associated therewith causing a power forced separation of the mold and lining.

14, In a rubber molding apparatus the combinationof a mold; a separable mold lining in the mold; a mold core; power .actuated mechanism exerting molding pressure on the mold; power actuated apparatus comprising pressure devices separating the lining and the core; means associated therewith; causing a power forced separation of the mold and lining; and means subjecting the mold to vulcanizing heat. 15; In a rubber molding apparatus, the combination of amold; a separable mold lining; a mold core; power actuating mechanism forcin the core and mold together to force a ow' of inserted rubber to mold cavity form; ower actuating appathe ratus comprisingdevlces separating the core combination of a mold; a separable mold ing a power forced separation of the mold lining; a mold core; power actuating and lining; and means subjecting the mold mechanism forcing the core and mold toto vulcanizing heat. 10 gether to force a flow of inserted rubber to In testimony whereof I have hereunto set mold cavity form; power actuating appamy hand.

ratus comprising devices separating the core and lining; means associated therewith caus JOHN F. ALLEN. 

